CN104950323A - Ray detector - Google Patents
Ray detector Download PDFInfo
- Publication number
- CN104950323A CN104950323A CN201510296950.8A CN201510296950A CN104950323A CN 104950323 A CN104950323 A CN 104950323A CN 201510296950 A CN201510296950 A CN 201510296950A CN 104950323 A CN104950323 A CN 104950323A
- Authority
- CN
- China
- Prior art keywords
- resistive plate
- electrode glass
- photocathode
- plate room
- ray detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a ray detector. The ray detector comprises a resistive plate chamber, a flickering body and a photoelectric cathode. The resistive plate chamber comprises a first resistive plate chamber and a second resistive plate chamber, which are connected. The first resistive plate chamber comprises first electrode glass, and the second resistive plate chamber comprises second electrode glass. The flickering body is arranged between the first resistive plate chamber and the second resistive plate chamber, the photoelectric cathode comprises a first photoelectric cathode and a second photoelectric cathode, the first photoelectric cathode is arranged on the first electrode glass and the second photoelectric cathode is arranged on the second electrode glass. The ray detector is high in ray detection sensitivity and has the advantages of quantum enhancement, high position resolution and low cost and the like. The ray detector can be widely applied to ray detectors, the ray detector has two resistive plate chambers, and ray detection efficiency is high.
Description
Technical field
The invention belongs to radiation detection field, particularly a kind of ray detector.
Background technology
At single photon emission tomographic imaging (Single-Photon Emission Computed Tomography, and positron emission tomography (Positron Emission Tomography SPECT), etc. PET) in detector system, owing to having scintillator structure, it is high that described detector has detection efficiency, the feature sensitive to ray, but its resolution characteristic is low.
The resolution force of resistive plate cell structure detector is high, but it is low to the sensitivity of ray, and when only having a resistive plate cell structure, detection efficiency is not high.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.For this reason, the invention provides a kind of ray detector.
The ray detector of embodiment of the present invention comprises resistive plate room, scintillator and photocathode.Described resistive plate room comprises the first resistive plate room and the second resistive plate room.Described first resistive plate room is connected with described second resistive plate room.Described first resistive plate room comprises the first electrode glass, and described second resistive plate room comprises the second electrode glass.Described scintillator is located between described first resistive plate room and described second resistive plate room.Described photocathode comprises the first photocathode and the second photocathode.Described first photocathode is located on described first electrode glass, and described second photocathode is located on described second electrode glass.
In the ray detector of embodiment of the present invention, highly sensitive to ray of described scintillator, detection efficiency is high, and described scintillator can produce visible ray by after ray excitation.And to have resolution characteristic strong in described resistive plate room, structure is simple, the features such as low price, described resistive plate room and described scintillator are combined, the high sensitivity of ray detector can be realized, the function of high resolution, and structure is simple, low price, can be widely used on X-ray detection X field, especially in the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET).Resistive plate room is divided into the first resistive plate room and the second resistive plate room, can absorb the visible ray that described scintillator sends more, improve the detection efficiency of described ray detector.Further, when one of described first resistive plate room or described second resistive plate room are damaged time, described ray detector can also work on.
In some embodiments, described first photocathode is located at described first resistive plate chamber interior, and with described first electrode glass surface contact; Described second photocathode is located at described second resistive plate chamber interior, and with described second electrode glass surface contact.
In some embodiments, described scintillator is arranged on described first electrode glass and described second electrode glass.
In some embodiments, described first resistive plate room also comprises the 3rd electrode glass and the first carbon film, described 3rd electrode glass is located at described first resistive plate chamber interior and is parallel to each other with described first electrode glass, and described first carbon film is located on the surface of described 3rd electrode glass away from described first photocathode;
Described second resistive plate room also comprises the 4th electrode glass and the second carbon film, described 4th electrode glass is located at described second resistive plate chamber interior and is parallel to each other with described second electrode glass, and described second carbon film is located on the surface of described 4th electrode glass away from described second photocathode;
Described first carbon film and described second carbon film are added with the positive voltage being greater than 1000V respectively, and described first photocathode and described second photocathode are added with the negative voltage being greater than 1000V respectively; Resistivity under described first electrode glass, the second electrode glass the 3rd electrode glass and described 4th electrode glass normal temperature is greater than 10
12Ω .cm.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the ray detector of embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more described features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection or can communication mutually; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.
The invention provides a kind of ray detector, be explained below in conjunction with accompanying drawing.
Refer to Fig. 1, the ray detector 100 of embodiment of the present invention comprises resistive plate room 10, scintillator 20 and photocathode 30.Resistive plate room 10 comprises the first resistive plate room 11 and the second resistive plate room 12.First resistive plate room 11 is connected with the second resistive plate room 12.First resistive plate 11 Room comprises the first electrode glass 111a, and the second resistive plate room 12 comprises the second electrode glass 121a.Scintillator 20 is located between the first resistive plate room 11 and the second resistive plate room 12.Photocathode 30 comprises the first photocathode 31 and the second photocathode 3231.First photocathode 31 is located on the first electrode glass 111a, and the second photocathode 32 is located on the second electrode glass 121a.
In the ray detector 100 of embodiment of the present invention, scintillator 20 pairs of rays highly sensitive, detection efficiency is high, and scintillator 20 can produce visible ray by after ray excitation.And to have resolution characteristic strong in resistive plate room 10, structure is simple, the features such as low price, resistive plate room 10 and scintillator 20 are combined, the high sensitivity of ray detector 100 can be realized, the function of high resolution, and structure is simple, low price, can be widely used on X-ray detection X field, especially in the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET).Resistive plate room 10 is divided into the first resistive plate room 11 and the second resistive plate room 12, can absorb the visible ray that scintillator 20 sends to surrounding more, improve the efficiency of ray detector 100 detected ray.Further, when one of first resistive plate room 12, resistive plate room 11 or the second is damaged time, ray detector 100 can also work on.
Photocathode 30 has the effect of opto-electronic conversion, can receive the visible ray that scintillator 20 sends, and inspire electronics, visible ray information can be converted to electronic information.Because each electronics all sends from photocathode 30, therefore from photocathode 30 electronics sent and the number of electrons approximately equal causing snowslide, so the resistive plate room 10 adding photocathode 30 is just equivalent to the photomultiplier cell of a gas, ray detector 100 has very high photoelectron gain function.
In some embodiments, it is inner that the first photocathode 31 is located at the first resistive plate room 11, and with the first electrode glass 111a surface contact; It is inner that second photocathode 32 is located at the second resistive plate room 12, and with the second electrode glass 121a surface contact.
So, the working gas that the first photocathode 31 is excited in the electrons of rear generation and the first resistive plate room 11 is had an effect, and working gas ionizes out electronic secondary.First photocathode 31 and the first electrode glass 111a surface contact, after the first photocathode 31 adds voltage, corresponding first electrode glass 111a also can add voltage, realizes the alive requirement of electrode glass in the technology of resistive plate room.
In some embodiments, scintillator 20 is arranged on the first electrode glass 111a and the second electrode glass 121a.
Setting like this, the distance of scintillator 20 and the first photocathode 31 and the second photocathode 32 can be shortened, reduce the impact of the visible ray that outer bound pair scintillator 20 sends, improve the efficiency that the first photocathode 31 and the second photocathode 32 collect the visible ray that scintillator 20 sends, thus improve the efficiency of ray detector 100 detected ray, sensitivity and resolution characteristic further.
In some embodiments, be filled with working gas respectively in the first resistive plate room 11 and the second resistive plate room 12, and the pressure of working gas is an atmospheric pressure.
Setting like this, under the electronic action that the first photocathode 31 or the second photocathode 32 send, working gas ionizes out more times grade of electronics, forms snowslide, increases the induction current that electronic secondary produces.
Further, working gas can be the gas such as freon or xenon, and this type of gas can ionize out electronic secondary and form snowslide under the effect of electronics.
In some embodiments, first resistive plate room 11 also comprises the 3rd electrode glass 111b and the first carbon film 112,3rd electrode glass 111b to be located within the first resistive plate room 11 and to be parallel to each other with the first electrode glass 111a, and the first carbon film 112 is located on the surface of the 3rd electrode glass 111b away from the first photocathode 31.First carbon film 112 and the first photocathode 31 are added with the generating positive and negative voltage being greater than 1000V respectively, and the resistivity under the first electrode glass 111a and the second electrode glass 121a normal temperature is greater than 10
12Ω .cm.
Second resistive plate room 12 also comprises the 4th electrode glass 121b and the second carbon film 122,4th electrode glass 121b is located at the second inside, resistive plate room 12 and is parallel to each other with the second electrode glass 121a, and the second carbon film 122 is located on the surface of the 4th electrode glass 121b away from the second photocathode 32.Second carbon film 122 and the second photocathode 32 are added with the generating positive and negative voltage being greater than 1000V respectively, and the resistivity under the second electrode glass 121a and the 4th electrode glass 121b normal temperature is greater than 10
12Ω .cm.
Setting like this, can make to form electric field between the first electrode glass 111a and the 3rd electrode glass 111b, under the effect of electric field, the electronic energy that the first photocathode 31 sends obtains high-energy, makes the working gas in the first resistive plate room 11 ionize out electronic secondary and forms snowslide.In like manner, the working gas in the second resistive plate room 12 also can ionize out electronic secondary and form snowslide.
In some embodiments, the first resistive plate room 11 also comprises the first sensing circuit 114 plate and the first electronics circuit 115, first sensing circuit 114 plate and the first electronics circuit 115 and is located at the first carbon film 112 successively away from the first photocathode 31 on the surface.Second resistive plate room 12 also comprises the second sensing circuit 124 plate and the second electronics circuit 125, second sensing circuit 124 plate and the second electronics circuit 125 and is located at the second carbon film 122 successively away from the second photocathode 32 on the surface.
Setting like this, first sensing circuit 114 plate and the second sensing circuit 124 plate can induce the electric current of the formation of electronic secondary, induction current, through digitized processing such as the first electronics circuit 115 and the second electronics circuit 125 amplifies, examinations, just can obtain energy and the strength information of incident ray.
In some embodiments, the shell of resistive plate room 10 is seal box 13, is respectively arranged with the first sealed insulation block 116 and the second sealed insulation block 126 between seal box 13 and the first electrode glass 111a and the second electrode glass 121a.Such setting can make the first resistive plate room 11 and the second resistive plate room 12 be a complete hermetic cavity, can prevent the working gas leakage in the first resistive plate room 11 and the second resistive plate room 12, thus affect the serviceability of ray detector 100.
First dielectric film 113 is set between the first carbon film 112 and the first sensing circuit 114 plate, the second dielectric film 123, first dielectric film 113 is set between the second carbon film 122 and the second sensing circuit 124 plate and the second dielectric film 123 can be Mylar film.So, the first sensing circuit 114 plate and the second sensing circuit 124 plate can be avoided directly to contact with high pressure respectively, prevent the first sensing circuit 114 plate and second circuit board to be damaged.
The course of work of ray detector 100 is as follows: for the first resistive plate room 11, and working gas is sealed in the first resistive plate room 11, and the first electrode glass 111a in the first resistive plate room 11 and the 3rd electrode glass 111b is arranged in parallel.First carbon film 112 and the first photocathode 31 add positive or negative high voltage respectively, and under the effect of high pressure, the gas space in the first resistive plate room 11 forms a stronger electric field, and the field intensity in gas can reach 10
4more than V/cm.People is when having a physical examination, the ray sent from human tissue organ is got to the scintillator 20 of ray detector 100, scintillator 20 is excited to send visible ray, visible ray gets electronics through the first electrode glass 111a on the first photocathode 31, electronics accelerates to obtain sufficiently high energy under highfield effect, and electrons and gas molecule effect ionize out electronic secondary.Under the effect of electric field, the electronic secondary ionized out forms snowslide in gas, and an electrons produces 10
7-10
8individual electronic secondary, can induce electric current, the digitized processing such as induction current is amplified by the first electronics circuit 115, examination in electronic secondary anode motion process, thus obtain energy and the strength information of incident ray on the first sensing circuit 114 plate.The course of work of the second resistive plate room 12 and the course of work of the first resistive plate room 11 similar.By the information that the information superposition that the first electronics circuit 115 and the second electronics circuit 125 obtain is total incident ray.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with described embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the present invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (4)
1. a ray detector, is characterized in that, comprising:
Resistive plate room, the second resistive plate room comprising the first resistive plate room and be connected with described first resistive plate room; Described first resistive plate room comprises the first electrode glass, and described second resistive plate room comprises the second electrode glass;
Be located at the scintillator between described first resistive plate room and described second resistive plate room; And
Photocathode, comprises the first photocathode and the second photocathode;
Described first photocathode is located on described first electrode glass; Described second photocathode is located on described second electrode glass.
2. ray detector as claimed in claim 1, it is characterized in that, described first photocathode is located at described first resistive plate chamber interior, and with described first electrode glass surface contact; Described second photocathode is located at described second resistive plate chamber interior, and with described second electrode glass surface contact.
3. ray detector as claimed in claim 1, it is characterized in that, described scintillator is arranged on described first electrode glass and described second electrode glass.
4. ray detector as claimed in claim 1, it is characterized in that, described first resistive plate room also comprises the 3rd electrode glass and the first carbon film, described 3rd electrode glass is located at described first resistive plate chamber interior and is parallel to each other with described first electrode glass, and described first carbon film is located on the surface of described 3rd electrode glass away from described first photocathode;
Described second resistive plate room also comprises the 4th electrode glass and the second carbon film, described 4th electrode glass is located at described second resistive plate chamber interior and is parallel to each other with described second electrode glass, and described second carbon film is located on the surface of described 4th electrode glass away from described second photocathode;
Described first carbon film and described second carbon film are added with the positive voltage being greater than 1000V respectively, and described first photocathode and described second photocathode are added with the negative voltage being greater than 1000V respectively; Resistivity under described first electrode glass, the second electrode glass, the 3rd electrode glass and described 4th electrode glass normal temperature is greater than 10
12Ω .cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510296950.8A CN104950323B (en) | 2015-06-03 | 2015-06-03 | Ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510296950.8A CN104950323B (en) | 2015-06-03 | 2015-06-03 | Ray detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950323A true CN104950323A (en) | 2015-09-30 |
| CN104950323B CN104950323B (en) | 2017-09-22 |
Family
ID=54165120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510296950.8A Active CN104950323B (en) | 2015-06-03 | 2015-06-03 | Ray detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104950323B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301625A (en) * | 2015-11-09 | 2016-02-03 | 清华大学 | Fast time response ray detector |
| WO2022267105A1 (en) * | 2021-06-25 | 2022-12-29 | 中国科学技术大学 | Gas detector fabrication method, gas detector, and ray detection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446319A (en) * | 2000-06-05 | 2003-10-01 | 爱克斯康特公司 | Radiation detection apparatus and method |
| JP2005003444A (en) * | 2003-06-10 | 2005-01-06 | Canon Inc | Radiation detector and radiation imaging system |
| CN1633606A (en) * | 2000-09-20 | 2005-06-29 | 爱克斯康特公司 | Adaptable energy-resolved detection of ionizing radiation |
| JP2007010332A (en) * | 2005-06-28 | 2007-01-18 | Nihon Medi Physics Co Ltd | Radiation detector |
| CN101339251A (en) * | 2008-06-13 | 2009-01-07 | 清华大学 | Sensitive radiation detecting device for ray particle two-dimensional location |
| CN103941277A (en) * | 2014-05-07 | 2014-07-23 | 清华大学 | Novel resistive plate chamber detector |
| CN204740348U (en) * | 2015-06-03 | 2015-11-04 | 清华大学 | Ray detector |
-
2015
- 2015-06-03 CN CN201510296950.8A patent/CN104950323B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446319A (en) * | 2000-06-05 | 2003-10-01 | 爱克斯康特公司 | Radiation detection apparatus and method |
| CN1633606A (en) * | 2000-09-20 | 2005-06-29 | 爱克斯康特公司 | Adaptable energy-resolved detection of ionizing radiation |
| JP2005003444A (en) * | 2003-06-10 | 2005-01-06 | Canon Inc | Radiation detector and radiation imaging system |
| JP2007010332A (en) * | 2005-06-28 | 2007-01-18 | Nihon Medi Physics Co Ltd | Radiation detector |
| CN101339251A (en) * | 2008-06-13 | 2009-01-07 | 清华大学 | Sensitive radiation detecting device for ray particle two-dimensional location |
| CN103941277A (en) * | 2014-05-07 | 2014-07-23 | 清华大学 | Novel resistive plate chamber detector |
| CN204740348U (en) * | 2015-06-03 | 2015-11-04 | 清华大学 | Ray detector |
Non-Patent Citations (1)
| Title |
|---|
| 李洋等: "多气隙电阻板室探测X射线研究", 《核电子学与探测技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301625A (en) * | 2015-11-09 | 2016-02-03 | 清华大学 | Fast time response ray detector |
| WO2022267105A1 (en) * | 2021-06-25 | 2022-12-29 | 中国科学技术大学 | Gas detector fabrication method, gas detector, and ray detection device |
| GB2621954A (en) * | 2021-06-25 | 2024-02-28 | Univ Science & Technology China | Gas detector fabrication method, gas detector, and ray detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104950323B (en) | 2017-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4031396A (en) | X-ray detector | |
| US4376892A (en) | Detection and imaging of the spatial distribution of visible or ultraviolet photons | |
| WO2004097886A3 (en) | X-ray tubes | |
| CN106597517B (en) | The alive scintillator probe of a kind of pair of scintillator | |
| CN104793229A (en) | Radial detector | |
| CN204740348U (en) | Ray detector | |
| CN204731420U (en) | Ray detector | |
| JPS5856956B2 (en) | Ionization chamber x-ray detector | |
| US4376893A (en) | Ion chamber array with reduced dead space | |
| CN104950323A (en) | Ray detector | |
| EP2834833A1 (en) | A detector for radiation, particularly high energy electromagnetic radiation | |
| Wang et al. | The design of a direct charge nuclear battery with high energy conversion efficiency | |
| JPS5831551B2 (en) | X-ray detector | |
| CN104749415B (en) | A kind of detector based on electron multiplier | |
| CN205176284U (en) | Fast time response X -ray detector | |
| KR20030089674A (en) | Digital X-ray detector using by plasma display panel | |
| CN105301625A (en) | Fast time response ray detector | |
| KR101610158B1 (en) | X-ray detector with metal substrates | |
| GB1561007A (en) | Ray detectors | |
| KR101153390B1 (en) | A wide range radiation detector system using ion and gas scintillation | |
| USRE30644E (en) | X-ray detector | |
| GB1561174A (en) | Ray detectors | |
| CN210322070U (en) | Ionization chamber and medical ray treatment equipment | |
| Nakhostin | Performance of a low-pressure Micromegas-like gaseous detector | |
| Ku et al. | Properties of an imaging gas scintillation proportional counter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100084 Haidian District 100084-82 mailbox Beijing Applicant after: Tsinghua University Applicant after: HEBEI TIANDI WISDOM MEDICAL EQUIPMENT CO., LTD. Address before: 100084 Haidian District 100084-82 mailbox Beijing Applicant before: Tsinghua University Applicant before: The world, Hebei intelligent medical treatment equipment company limited |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |